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Collection Coverage- 1940s (1)
- Santa Cruz (County) (1)
- Henry J. Kaiser Company (1)
- Mines and Mining-Sand and Gravel (1)
- Pacific Coast Aggregates (1)
- Pleasant Valley Excavation (1)
- Rubis Sand Pit (1)
- Titus Gravel Pit (1)
- ARTICLE (1)
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- by only a few hundred yards, and resembles the latter workings in so many respects (products, capacity, methods, plant, number of men employed, and others) that only some of the major differences will be listed here and the reader is referred for details
